Imports of http2 command

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/labstack/echoPackage echo implements high performance, minimalist Go web framework.
github.com/labstack/echo/engine
github.com/labstack/echo/engine/standard
net/httpPackage http provides HTTP client and server implementations.
timePackage time provides functionality for measuring and displaying time.